PHP watermarking Code supports text and image watermarks

PHP adds image and text watermark codes, and PHP adds watermarks. It supports the transparency setting of text image watermarks and the transparency of the watermark image background. A class written by myself, because a CMS developed by myself will be used in it, it is always difficult to use it on the Internet. I hope everyone will also like this class, followed by the class usage method.

001

002 class WaterMask {

003 public $ waterType = 1; // watermark type: 0 indicates a text watermark, and 1 indicates an image watermark.

004 public $ pos = 0; // watermark position

005 public $ transparent = 45; // watermark transparency

006 public $ waterStr = 'www .codefans.net '; // watermark text

007 public $ fontSize = 16; // text font size

008 public $ fontColor = array (255, 0, 255); // watermark text color (RGB)

009 public $ fontFile = 'ahgbold. ttf'; // font file

010 public $ waterImg = 'logo.png '; // watermark image

011 private $ srcImg = ''; // image to which a watermark is to be added

012 private $ im = ''; // image handle

013 private $ water_im = ''; // watermark image handle

014 private $ srcImg_info = ''; // picture information

015 private $ waterImg_info = ''; // watermark image information

016 private $ str_w = ''; // watermark text width

017 private $ str_h = ''; // watermark text height

018 private $ x = ''; // watermark X coordinate

019 private $ y = ''; // y coordinate of the watermark

020 function _ construct ($ img ){

021 $ this-> srcImg = file_exists ($ img) $ img: die ('"'. $ img. '" sorry, the watermark file does not exist! ');

022}

023 private function imginfo () {// obtain and load the watermark image information.

024 $ this-> srcImg_info = getimagesize ($ this-> srcImg );

025 switch ($ this-> srcImg_info [2]) {

026 case 3:

027 $ this-> im = imagecreatefrompng ($ this-> srcImg );

028 break 1;

029 case 2:

030 $ this-> im = imagecreatefromjpeg ($ this-> srcImg );

031 break 1;

032 case 1:

033 $ this-> im = imagecreatefromgif ($ this-> srcImg );

034 break 1;

035 default:

036 die ('watermark image ('. $ this-> srcImg.') watermark image format is incorrect. Please select images in PNG, JPEG, and GIF formats. ');

037}

038}

039 private function waterimginfo () {// obtain and load the watermark image.

040 $ this-> waterImg_info = getimagesize ($ this-> waterImg );

041 switch ($ this-> waterImg_info [2]) {

042 case 3:

043 $ this-> water_im = imagecreatefrompng ($ this-> waterImg );

044 break 1;

045 case 2:

046 $ this-> water_im = imagecreatefromjpeg ($ this-> waterImg );

047 break 1;

048 case 1:

049 $ this-> water_im = imagecreatefromgif ($ this-> waterImg );

050 break 1;

051 default:

052 die ('watermark image ('. $ this-> srcImg.') format is incorrect. Only PNG, JPEG, and GIF images are supported. ');

053}

054}

055 private function waterpos () {// watermark position Algorithm

056 switch ($ this-> pos ){

057 case 0: // random position

058 $ this-> x = rand (0, $ this-> srcImg_info [0]-$ this-> waterImg_info [0]);

059 $ this-> y = rand (0, $ this-> srcImg_info [1]-$ this-> waterImg_info [1]);

060 break 1;

061 case 1: // upper left

062 $ this-> x = 0;

063 $ this-> y = 0;

064 break 1;

065 case 2: // upper

066 $ this-> x = ($ this-> srcImg_info [0]-$ this-> waterImg_info [0])/2;

067 $ this-> y = 0;

068 break 1;

069 case 3: // upper right

070 $ this-> x = $ this-> srcImg_info [0]-$ this-> waterImg_info [0];

071 $ this-> y = 0;

072 break 1;

073 case 4: // center left

074 $ this-> x = 0;

075 $ this-> y = ($ this-> srcImg_info [1]-$ this-> waterImg_info [1])/2;

076 break 1;

077 case 5: // Medium

078 $ this-> x = ($ this-> srcImg_info [0]-$ this-> waterImg_info [0])/2;

079 $ this-> y = ($ this-> srcImg_info [1]-$ this-> waterImg_info [1])/2;

080 break 1;

081 case 6: // middle right

082 $ this-> x = $ this-> srcImg_info [0]-$ this-> waterImg_info [0];

083 $ this-> y = ($ this-> srcImg_info [1]-$ this-> waterImg_info [1])/2;

084 break 1;

085 case 7: // bottom left

086 $ this-> x = 0;

087 $ this-> y = $ this-> srcImg_info [1]-$ this-> waterImg_info [1];

088 break 1;

089 case 8: // bottom

090 $ this-> x = ($ this-> srcImg_info [0]-$ this-> waterImg_info [0])/2;

091 $ this-> y = $ this-> srcImg_info [1]-$ this-> waterImg_info [1];

092 break 1;

093 default: // bottom right

094 $ this-> x = $ this-> srcImg_info [0]-$ this-> waterImg_info [0];

095 $ this-> y = $ this-> srcImg_info [1]-$ this-> waterImg_info [1];

096 break 1;

097}

098}

099 private function waterimg (){

100 if ($ this-> srcImg_info [0] <= $ this-> waterImg_info [0] | $ this-> srcImg_info [1] <= $ this-> waterImg_info [1 ]) {

101 die ('watermark is larger than the source image! ');

102}

103 $ this-> waterpos ();

104 $ cut = imagecreatetruecolor ($ this-> waterImg_info [0], $ this-> waterImg_info [1]);

105 imagecopy ($ cut, $ this-> im, $ this-> x, $ this-> y, $ this-> waterImg_info [0], $ this-> waterImg_info [1]);

106 $ pct = $ this-> transparent;

107 imagecopy ($ cut, $ this-> water_im, $ this-> waterImg_info [0], $ this-> waterImg_info [1]);

108 imagecopymerge ($ this-> im, $ cut, $ this-> x, $ this-> y, $ this-> waterImg_info [0], $ this-> waterImg_info [1], $ pct );

109}

110 private function waterstr (){

111 $ rect = imagettfbbox ($ this-> fontSize, 0, $ this-> fontFile, $ this-> waterStr );

112 $ w = abs ($ rect [2]-$ rect [6]);

113 $ h = abs ($ rect [3]-$ rect [7]);

114 $ fontHeight = $ this-> fontSize;

115 $ this-> water_im = imagecreatetruecolor ($ w, $ h );

116 imagealphablending ($ this-> water_im, false );

117 imagesavealpha ($ this-> water_im, true );

118 $ white_alpha = imagecolorallocatealpha ($ this-> water_im, 255,255,255,127 );

119 imagefill ($ this-> water_im, $ white_alpha );

120 $ color = imagecolorallocate ($ this-> water_im, $ this-> fontColor [0], $ this-> fontColor [1], $ this-> fontColor [2]);

121 imagettftext ($ this-> water_im, $ this-> fontSize, $ this-> fontSize, $ color, $ this-> fontFile, $ this-> waterStr );

122 $ this-> waterImg_info = array (0 => $ w, 1 => $ h );

123 $ this-> waterimg ();

124}

125 function output (){

126 $ this-> imginfo ();

127 if ($ this-> waterType = 0 ){

128 $ this-> waterstr ();

129} else {

130 $ this-> waterimginfo ();

131 $ this-> waterimg ();

132}

133 switch ($ this-> srcImg_info [2]) {

134 case 3:

135 imagepng ($ this-> im, $ this-> srcImg );

136 break 1;

137 case 2:

138 imagejpeg ($ this-> im, $ this-> srcImg );

139 break 1;

140 case 1:

141 imagegif ($ this-> im, $ this-> srcImg );

142 break 1;

Default 143:

144 die ('unknown reason: watermark addition failed! ');

145 break;

146}

147 imagedestroy ($ this-> im );

148 imagedestroy ($ this-> water_im );

149}

150}

151?>

PHP watermark generation usage:

View sourceprint? 01

02 $ obj = new WaterMask ($ imgFileName );

03 $ obj-> $ waterType = 1; // watermark type: 0 indicates a text watermark, and 1 indicates an image watermark.

04 $ obj-> $ transparent = 45; // watermark transparency

05 $ obj-> $ waterStr = 'www .codefans.net '; // watermark text

06 $ obj-> $ fontSize = 16; // font size

07 $ obj-> $ fontColor = array (255, 0,); // watermark text color (RGB value)

08 $ obj-> $ fontFile = 'ahgbold. ttf'; // font name

09 $ obj-> output (); // output watermark image

10?>